Digging machine



June 3o, 1925. 1,544,337V

'. S.G.NORDENGREN DIGGING MACHINE Fild Jan. 19, 1924 Patented June 3f), 1925'.

ersten SVEN GUN'NAR NoRDnNGnrmoF LANnsKnoNa savanna".

vDIGGING MACHINE.

application :nea January l1e, 19724. 'seran N. 687,393.

T0 all whom t may Concern. Y g

Be it known that l, Svc-N GUNNAR Non-A DnNsnnN, a subject ofthe King or" Sweden, residing at Landskrona, Sweden, have 1nvented certain new and useful Improvements in Digging Machines, of which the following is a specification. l i

The Vobject of the invention is theprovision Aof a digging machine which, besides being serviceable in such cases Where/adigging machine is generally used, isspecially adapted for digging out goods orfproducts kep-t in store buildings. l

A further object or" the invention'is kthe provision of a digging machine of-,tlie'endless conveyorv type having an adjustable frame. i v

Another object of theinvention 1s the provision oi a pivoted extensiblef'trame torv the conveyor with means for automatically ooimterbalancing the combined LWeight vof the frame and conveyorin any'position.

Still another object of the invention =1s the provision of avoonveyor ranreadapted for adjustment to any 'lined `position '1n a vertical plane.

Other objects andadvantages ot Vthe invention Will appear in the following description, reference being .had to the'aeconipanying drawings.

ln the drawings: l y

Fig. 1 is an elevation of the machine, and Figs. 2-6 are diagrammatic vien's'showing several Ways or' using the machine, 3

specially illustrating the operation of the machine in columned store buildings.

In Fig. 1, the horizontal shaft through A, is 'fastened with bearings to a movable stand 1 and carries a polygonal fra-me ABCD, the rigid members 2, 3, l and 5 of which are movably joined together at the corners. Rotatably mounted in these corners are Wheels carrying endless chains 6 to Which digging tools 7 are secured.

'Vhen the machine is to made ready for operation, the polygonal frame ABCD is placed in sucha .position as to cause the digging tools to properly engage the material to be dug out. The form of the frame is then securely fixed, and the stand is moved at a uniform rate oit' speed along the pile of the material. In digging out a suitable quantity in this vvay, the digging-tools are lowered into the pile and the. stand is moved in the opposite direction.

Vof sliding down. plane, as thefpointC can be madel to describe -gon (.Figl- .the level, the machine is operated `manner shown in `Figures 6 `and Q ,Ythose Ypositions bein'grespect-ively the lirstvandf the f bala-need in all Accordingl to the 'condition or". the 'material operated-on, the frame is placed in diilerent positions. vFor material such as'superphosphate -thatdoes not A:termv a. constant angle Withthe level, the frame is iixediin such positions that an inclination is-obtained having a-smaller anglevto the level than the smallest angle possible, if the "goods'is to preserve 'its inclination Without the risk The `incline can bemade a straight line in the plane 'of the poly changingtlie angle BAD (Figs. land @For goods forming a constant angle with in the last ones laitter and ,-beforethe moving "of the stand in the direct-ion of. thepile. n

V.The said 'alterationsof the vframe`may be effected manually if the polT gon ABCD is balanced in a suitable Way. For this purpose, the sides 2 and 4L of theframe ABCD may-be lengthened with the parts 14 and 15,5 having theirends Blcand D1 vmov'ably, joined Withtivo other f parts 8 and 9 retogether spectively (Fig. l), the latter-parts being likewise movably, joined as at. C? and carrying a bala-nce Weight 1().` V'itthe pelygon ABl' Cil)1 is made equiform t'o` the polygon ABCD, the Weight of ABCD 'may vbe positions by the veight lined rlhe polygonal frame ABCD is preferably made quadrangnlar with all sides of the same length or ABzAD and BCzDC. It

the goods are pulverulent or granular,"

buckets may be used as digging-tools.

In order to prevent spilling of the goods from the parts AB and BC, the latter may be provided With chutes 1l, in which the material is transported, the digging-tools serving asy transporting means.. 'Cn the material having been transported to A, the same Will fall down into a hopper 12 after having first passed, if desired, through a pulverizing devicev 16 provided With a sieve or not, as required, and from the said hopper the material isr further passed to barrows or bags 13.

If the position of the digging-tools is rllhe inclinelis :altered The only Work required viiorthe alteratmn of the fra-me ,1s thatfivhich lsf to be brought about manually, the machine Will require only asimple construction, the

only'parts demanding machine power being the movements to and able quantity'may be dug o-ut without the f necessity ofshifting the stand in the y'direotionof thepile` (Figs. 4.- and 5).

The construction is specially stores built with columns. `The machine is to beplaced in such positions thatv the stand may vbe moved between the columns,

t the frames carrying the digging-tools having `to be turned rbackv When passing a column (Fig. 3).

`-Ifrequired, the frame can bef l'made re;v

volving in the horizontal aswell as in the v.vertical plane.

With lthe construction-l describedabove,

the counterweight Vl()f counterbalancesl the combined Weight-of the polygonal `:frame ABCD and the endless yconveyor 6 carried` thereby in all positions "of adjustment since the frame members Qia'nd 4f varev operative through the extension `members 14 andf15 j to change the length ofthe moment arm of counterWeight i Vin. the centerofgravity lof the polygonal frame in ally positions of adjustment aboutVV [the center Vof supporter. The invention is susceptible of various 10 in proportion to variations changes in its form',v proportions and minor details of constructionfand the right is herein reserved to make such changesas properly allrwithin thescope of the appended-claims.

What I claiiniasnew and desire to secure by Letters Patent ofthe United Statesl ofA America is Y 1,.V A diggingmachine comprising vanend- Vless chain, digging tools fixed onsaid chain,

an extensibleV frame supporting said fch am,

Vsaid frame being of polygonal forni and com-. prising rigid frame members pivotally con' Y Vnected with each other, a stand pivotally" supporting the frame,` and means Vcarried by theframe for automatically maintainingV positions of 'adjus Y i 2. In a device of the class described, .a

fro of the stand and 50 the movementof the chains.` A' c onsider-V Y Y,porting said connections,

adapted tof'by the` frame for polygonal frame comprising pivotally ycon-V nected .extensible members, means for .sup-

said frame and Vcarrier in stable equilibrium support, a lframe member pivotally mountedy intermediate it-sen-ds on said support, a

ticial plane, p-airsfof'link .members pivoted frame from one of said pivotal an endless carrier rotatably Vmounted on theqfname, and means carried automatically maintainingv on said supporting means in` all positions of i i adjustment. l y I :r 3. In ai device of the class described,` a

at one end to adjacent endsof said frame members and at the other end to eachother, an endlesscarrier operatively earriedlby the "members `on one si'de of said support anda counterweight clarried by the vmembers 'on Y theother side of said support.

. 4. In a digging 'machine, a support, an

extensibleframe pivotedto the sup-port,ex cavating means A'supported by said'V frame,

and means carried said frlamefforV autoinstable equilibrium.

Vmaticallymai-ntaii'iing said frame and 'means f 5. 'In' a digging maohine,'- a. support,

excavator Vof "the .endless carrier type Lj'ournaledlon said support and free to move in a vertical plane, l ing the inclination of portion of the carrier,

the Workengaging and means carried by said means 'for'v automatically compen-V Y sating for variations in the moment. arm of said excavator. Y Y

In testimony whereof I afix my in presence of. two Witnesses.

f SVEN GUNNAR NORDENGREN.`

I. Witnesses:

' J; NELSON,

M. WEHRLAR. 1

means for manually vary Y Y signature y 

